Caracterização da madeira juvenil de Eucalyptus camaldulensis Dehnh, para aplicação na arquitetura rural.

Abstract

Reforestation and sustainable forest management are practices that aim at environmental protection as a way to support reduction of deforestation and unrestrained use of native species. The main objective of this study was to analyze the quality of juvenile wood of Eucalyptus camaldulensis Dehnh. planted in Rio Tinto, PB, for the use in rural architecture, with emphasis on the making of furniture. Aiming to determine the wood properties, physicalmechanical tests were conducted by using the simplified wood characterization method. Through physical tests values of humidity tenor, density, bulk density, shrinkage and swelling and the coefficient of anisotropy were obtained. The mechanical tests were carried out using linear variable displacement transducers (LVDT's) coupled to the data acquisition system. These tests determined the values of rigidity and resistance of wood to parallel compression to the fiber. The method used for the treatment of wood was the sap displacement for radial transpirations using chromated copper borate (CCB) where was analysed the effect of the samples inversion in the preservative solution. In order to check the quality of the treatment of wood, distribution, penetration and retention in the wood were analyzed. The values obtained showed that the juvenile wood of E. camaldulensis can be clustered according to the classification of resistance C 20 for trees determined by NBR 7190. Taking into consideration that the wood this study investigates has low resistance in comparison with other exotic woods, its use for structural purposes is unadvisable. Nevertheless, it can be used for rural secondary elements of architecture, including the manufacture of furniture. The distribution, penetration and retention were better succeeded in the samples that were reversed, when compared with the non-reversed samples in the preservative solution.